The Talbot effect in a two-dimensional system with Rashba spin–orbit coupling
The Talbot effect in a two-dimensional system with Rashba spin–orbit coupling
复制标题
二维Rashba自旋轨道耦合系统中的塔尔博特效应
DOI：
10.1088/1402-4896/ab4208
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发表时间：
2020-01
期刊：
影响因子：
2.9
通讯作者：
J. Walls;Zhaoyuan Gong
中科院分区：
文献类型：
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作者：
J. Walls;Zhaoyuan Gong
在这项工作中，从一个周期性的准一维阵列的二维平面波的散射，局部散射体在Rashba自旋轨道耦合的存在下的理论。自旋子带分辨透射和反射系数沿着透射和反射波函数的公式推导。在自旋轨道耦合的存在下，塔尔博特效应，其中周期性调制的传输概率密度出现沿着方向正交的散射势的周期性方向，示出发生。然而，它表明，Rashba自旋-轨道耦合增加了所观察到的干涉图案的复杂性，其中不同类型的塔尔博特长度，由于两个自旋和intraspin子带散射预测。数值计算提供了支持在这项工作中提出的理论计算。
In this work, a theory for the scattering of two-dimensional plane-waves from a periodic, quasi-one-dimensional array of nonmagnetic, localized scatterers in the presence of Rashba spin–orbit coupling is presented. Formulas for the spin-subband resolved transmission and reflection coefficients along with the transmitted and reflected wave functions are derived. In the presence of spin–orbit coupling, the Talbot effect, where periodic modulations in the transmitted probability density arise along a direction orthogonal to the periodic direction of the scattering potential, is shown to occur. However, it is demonstrated that Rashba spin–orbit coupling increases the complexity of the observed interference patterns where different types of Talbot lengths due to both interspin and intraspin subband scattering are predicted. Numerical calculations are provided to support the theoretical calculations presented in this work.